package com.atguigu.gulimall.cart.controller;

import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.CartItemVo;
import com.atguigu.gulimall.cart.vo.CartVo;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.ExecutionException;

/**
 * @author: kaiyi
 * @create: 2020-09-12 10:58
 */
@Controller
public class CartController {

  @Resource
  private CartService cartService;

  /**
   * 获取当前用户的购物车商品项
   * @return
   */
  @GetMapping(value = "/currentUserCartItems")
  @ResponseBody
  public List<CartItemVo> getCurrentCartItems() {

    List<CartItemVo> cartItemVoList = cartService.getUserCartItems();

    return cartItemVoList;
  }

  /**
   * 去购物车页面的请求
   * 浏览器有一个cookie:user-key 标识用户的身份，一个月过期
   * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份:
   * 浏览器以后保存，每次访问都会带上这个cookie；
   *
   * 登录：session有
   * 没登录：按照cookie里面带来user-key来做
   * 第一次，如果没有临时用户，自动创建一个临时用户
   *
   * @return
   */
  @GetMapping(value = "/cart.html")
  public String cartListPage(Model model) throws ExecutionException, InterruptedException {
    //快速得到用户信息：id,user-key
    // Thread t = Thread.currentThread();
    // UserInfoTo userInfoTo = CartInterceptor.toThreadLocal.get();

    CartVo cartVo = cartService.getCart();
    model.addAttribute("cart",cartVo);
    return "cartList";
  }


  /**
   * 添加商品到购物车
   * attributes.addFlashAttribute():将数据放在session中，可以在页面中取出，但是只能取一次
   * attributes.addAttribute():将数据放在url后面
   * @return
   */
  @GetMapping(value = "/addCartItem")
  public String addCartItem(@RequestParam("skuId") Long skuId,
      @RequestParam("num") Integer num,
      RedirectAttributes attributes) throws ExecutionException, InterruptedException {

    cartService.addToCart(skuId,num);

    attributes.addAttribute("skuId",skuId);
    return "redirect:http://cart.gulimall.com/addToCartSuccessPage.html";
  }


  /**
   * 跳转到添加购物车成功页面
   * @param skuId
   * @param model
   * @return
   */
  @GetMapping(value = "/addToCartSuccessPage.html")
  public String addToCartSuccessPage(@RequestParam("skuId") Long skuId,
      Model model) {
    //重定向到成功页面。再次查询购物车数据即可
    CartItemVo cartItemVo = cartService.getCartItem(skuId);
    model.addAttribute("cartItem",cartItemVo);
    return "success";
  }


  /**
   * 商品是否选中
   * @param skuId
   * @param checked
   * @return
   */
  @GetMapping(value = "/checkItem")
  public String checkItem(@RequestParam(value = "skuId") Long skuId,
      @RequestParam(value = "checked") Integer checked) {

    cartService.checkItem(skuId,checked);

    return "redirect:http://cart.gulimall.com/cart.html";

  }


  /**
   * 改变商品数量
   * @param skuId
   * @param num
   * @return
   */
  @GetMapping(value = "/countItem")
  public String countItem(@RequestParam(value = "skuId") Long skuId,
      @RequestParam(value = "num") Integer num) {

    cartService.changeItemCount(skuId,num);

    return "redirect:http://cart.gulimall.com/cart.html";
  }


  /**
   * 删除商品信息
   * @param skuId
   * @return
   */
  @GetMapping(value = "/deleteItem")
  public String deleteItem(@RequestParam("skuId") Integer skuId) {

    cartService.deleteIdCartInfo(skuId);

    return "redirect:http://cart.gulimall.com/cart.html";

  }


}
